1. Department of Dermatology; Hospital Universitario La Paz; Madrid Spain
2. Department of Pediatric Surgery; Hospital Universitario La Paz; Madrid Spain
3. Department of Pathology; Hospital Universitario La Paz; Madrid Spain
4. Department of Dermatology; Hospital de la Santa Creu i Sant Pau; Barcelona Spain
5. Department of Dermatology; Consorcio Hospital General Universitario de Valencia; Valencia Spain
6. Department of Dermatology; Hospital Infantil Niño Jesús; Madrid Spain
7. Department of Dermatology; Hospital Universitario Gregorio Marañón; Madrid Spain
8. Department of Pediatric Surgery; Hospital Universitario Gregorio Marañón; Madrid Spain
9. Department of Dermatology; Hospital Reina Sofía; Córdoba Spain
10. Department of Dermatology; Hospital Materno-Infantil, Complejo Hospitalario Carlos Haya; Málaga Spain
11. Department of Dermatology; Hospital Sant Joan de Deu; Barcelona Spain
12. Department of Dermatology; Hospital Universitario Virgen del Rocío; Sevilla Spain
13. Dermatopathology Laboratory; Friedrichshafen Germany
14. Department of Dermatology; Fundación Jiménez Díaz; Universidad Autónoma; Madrid Spain